1??Web???????

????Web????????漰???Χ????????web??????????????????????????????????????????????????????????????????????????????????????????????????檔??????漰????????????????????????????????????????

????* ????????????????????????????????????????????????????????????

????* ?????????

????* Web Server ????????????(?????????????????????)

????* ???й?

????* Http?????????????????????????????????????????????????

????2??CC????

????CC?????????????????.?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

????????????治???????????????????????????????????ж??????????????????????????????????????????????????????????ж???????ж????????????????У?????????????????????????????????????????2?????????????????????200MB??С??????????????200MB??С??????????????飬??????????CPU?????????????????????????????????????????????????????????????????С???Χ???????????????????????????????????????????鵽??????????????????????????????е????????????ж?????????????????.

????CC????????????????????????(???????????????)???????з???(??????Щ?????????????????????????CPU???????).????????????????????????????????????????????????

?????????????A??Search.asp???????????0.01S(????????????????????????)????????????????100???????Search????????????????????????60s????????????CC???120????????????????????? 1????????????????????7200?Σ???????6000?Σ??????????1200????????????б?????.?е???????:??????!??????!??????????????????????????????1200???????10?????????????!???磬??????????????????????????????????????7200???????????????У? ???????????120??/?????????????????????????120??/????????????д????????????????????CPU ??????????????????60?????????ж?????????????μ????????????????????????????????????.

????????????????????Search?????0.01S?????10????(?????????????????п??????????????????)?????????????????120???????????????????????60S??????????????????120?????????????????????????????????????????????????????????????????????SQL??????????????У??????????????????????????????????????????????У?????????????????????????????????????????.

????3??????????

??????????????????????????????????????????????????????η?????????????????????????????????????????д??????.

????1. ???Cookie???.??????????CC?????????Cookie???????????Cookie????????????????????????IP Cookie?????????.

????2. ????Session.????ж??Cookie??????????????IP???????????????????????????ж???￡?????2???????????????·????????·???.??Щ?????????Session:

???????????:

??????%

????if session(??refresh??)???? 1 then

????Session(??refresh??)=session(??refresh??) 1

????Response.redirect ??index.asp??

????End if

????%??

???????????????η???????Refresh=1??????η???????????????Σ?????????????????????￡???????????????????????????????????????????????????????????????????????????????.

????3.???????????HTTP_X_FORWARDED_FOR???????ж???????????????????IP?????????????????????????????????????????е?????????????????????к?????????????????.???????:

???????????:

??????%

????Dim fsoObject

????DimtsObject

????dim file

????ifRequest.ServerVariables(HTTP_X_FORWARDED_FOR)= then

????response.write????????

????response.end

????endif

????Set fsoObject =Server.CreateObject(scr??pting.FileSystemObject)

????file = server.mappath(CCLog.txt)

????if notfsoObject.fileexists(file)then

????fsoObject.createtextfilefile??true??false

????end if

????settsObject = fsoObject.OpenTextFile(file??8)

????tsObject.WritelineRequest.ServerVariables(HTTP_X_FORWARDED_FOR)&[&Request.ServerVariables(REMOTE_ADDR)&]&now()

????Set fsoObject = Nothing

????Set tsObject =Nothing

????response.write?д??????

????%??

??????????????CCLog.txt?????????????:???IP [?????IP]?????????????IP???????????????????????.?????????????Conn.asp??????????Щ??????????????????????е???????????????????????????????????????????.

????4.??????????????????????????????????Redirect???棬?????????????????ж???棬???Redirect???.

????5.??????????????????????????????????IP????????CPU?????????????????Ч?????.

????CC??????????????????????????????????????Щ??????????SQL???????????????????????????DDOS?????????????????????.????????????????????????5000???CC???????????????????????е?????????????????????????????Session???棬???????棬???Ч??.???????????????????????????????????????????????????????????????800?????????????????????????.

????????????????????ε????????????????????????????????????????????????????????????????!